bfl/flux-2/klein/9b/edit
Flux 2 Klein 9b by BFL - AI-powered image editing, style transfer, and transformation. Edit photos with natural language instructions, remove backgrounds, change styles, and enhance images effortlessly.
PNG, JPEG, WebP, or GIF · 20 MiB maximum each
Example output — click Run to generate your own
Send your first request
OpenAI-compatible endpoint with unified authentication and usage tracking.
https://api.sandbase.ai/v1/runbfl/flux-2/klein/9b/editInput Schema
6 parameters · 1 required · 5 optional
| Parameter | Type | Required | Description |
|---|---|---|---|
prompt | string | Required | The prompt to edit the image. |
seed | integer | Optional | The seed to use for the generation. If not provided, a random seed will be used. |
images | string[] | Optional | The URLs of the images for editing. A maximum of 4 images are allowed. |
aspect_ratio | string | Optional | The aspect ratio of the generated image. · Options: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16 21:916:93:24:35:41:14:53:42:39:16 |
output_format | string | Optional | The format of the generated image. · Options: jpeg, png · Default: "png" jpegpng |
num_inference_steps | integer | Optional | The number of inference steps to perform. · Min: 4 · Max: 8 · Default: 4 |
Output Schema
| Field | Type | Description |
|---|---|---|
id | string | Unique identifier for the generation task |
status | string | Task status: pending, running, completed, failed, timeout |
model | string | Model used for the generation |
outputs | array | Array of output items |
outputs[].url | string | URL of the generated artifact |
outputs[].content_type | string | MIME type (e.g. image/png, video/mp4) |
error | object | null | Error details if failed, null on success |
error.type | string | Machine-readable error type code |
error.message | string | Human-readable error description |
Async Workflow
This model uses asynchronous execution. Submit a request and poll for the result.
- Submit — POST to /v1/run, receive an
id - Poll — GET /v1/run/{id} until status is
completed,failed, ortimeout - Retrieve — Read
outputsfrom the completed response
Code Examples
Ready-to-run snippets
# Step 1: Submit
curl -X POST https://api.sandbase.ai/v1/run \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "bfl/flux-2/klein/9b/edit",
"images": [
"https://static.sandbase.ai/examples/bfl/flux-2/klein/9b/edit/input_images_0.png"
],
"prompt": "Turn this into a realistic image",
"output_format": "png",
"num_inference_steps": 4
}'
# Step 2: Poll result (replace <id>)
curl https://api.sandbase.ai/v1/run/<id> \
-H "Authorization: Bearer YOUR_API_KEY"API README
Flux 2 Klein 9b
Flux 2 Klein 9B Edit changes and enhances existing photos through natural-language instructions. It keeps the supplied visual at the center of the process, allowing a written brief to revise an asset rather than replace it with an unrelated composition.
The model uses a focused 4–8 inference-step range for concise iteration. It also accepts optional image inputs, supports ten aspect ratios, exports JPEG or PNG, and provides a seed for repeatable comparisons.
Highlights
Natural-language editing. Describe the requested photo change in familiar creative language and refine the instruction between attempts.
Existing-image enhancement. Improve a supplied visual while retaining the asset that establishes its subject and composition.
Focused iteration range. Work within 4–8 inference steps when a project benefits from short review cycles.
Placement-ready output. Choose among ten aspect ratios, export JPEG or PNG, and retain a seed for reproducible variations.
Pricing
| Billing unit | Price |
|---|---|
| Per request | $0.015 |
When to Use
| ✅ Good fit | ❌ Consider alternatives |
|---|---|
| The model's named workflow matches the source material and intended output | A different input modality or model route is required |
| A managed asynchronous result is suitable for the production pipeline | A synchronous, interactive editor is essential |
| The documented controls cover the required duration, framing, or format | The project needs controls outside this endpoint's schema |
| Creative iteration benefits from a repeatable request structure | Exact deterministic pixels, frames, geometry, or samples are mandatory |
| A finished downloadable media asset is the desired deliverable | Editable source layers or a native project file are required |
Prompt Guide
For generation, state the intended result first, then add the subject or source treatment, progression, style, and delivery constraints. Keep one creative variable per phrase, use the documented field names for controls, and change one setting at a time when comparing results.
{
"aspect_ratio": "21:9",
"images": [
"https://example.com/reference-1.png",
"https://example.com/reference-2.png"
],
"output_format": "png",
"prompt": "Turn this into a realistic image"
}
Technical Specs
| Spec | Value |
|---|---|
| Model ID | bfl/flux-2/klein/9b/edit |
| Inputs | aspect_ratio, images, num_inference_steps, output_format, prompt, seed |
| Required inputs | prompt |
| Output fields | content_type, url |
| Execution | Async (submit, then poll for result) |
| Aspect Ratio | 21:9 / 16:9 / 3:2 / 4:3 / 5:4 / 1:1 / 4:5 / 3:4 / 2:3 / 9:16 |
| Output Format | jpeg / png |
Related Models
bfl/flux-2/klein/9b/edit/lora— Compare this concrete local family route.bfl/flux-2/klein/9b— Compare this concrete local family route.bfl/flux-2/klein/9b/base— Compare this concrete local family route.